How much fertilizer for hay?

A fertilizer that delivers boron, nitrogen, phosphorus, potassium and sulfur describes the best fertilizer for hay. Its content and its timing must be coordinated with soil analysis and pH (power of hydrogen) level testing for optimal spring and summer growth. Deficiencies, excesses and removal rates of the above-mentioned nutrients from soil, and their impact upon other nutrients such as calcium and magnesium, during root and shoot development need to be calculated into the treatment schedule.